Robert L Steigerwald

US Patent:

6369535, Apr 9, 2002

Filed:

Jul 31, 2001

Appl. No.:

09/682169

Inventors:

Jing Wang - Schenectady NY
Robert Louis Steigerwald - Burnt Hills NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 2300

US Classification:

318254, 318138, 318439, 318801, 318812

Abstract:

A method and apparatus are disclosed for shaping current in an electronically commutated motor (ECM), the method comprising: acquiring a set of terminal voltage measurements; estimating an instantaneous rotor angle from the terminal voltage measurements; generating a set of phase current commands from the instantaneous rotor angle and from a torque reference signal, each of the phase current commands comprising at least one ripple compensation command segment and at least one zero current command segment; and converting the set of phase current commands to a set of current reference signals.

US Patent:

6407465, Jun 18, 2002

Filed:

Sep 14, 2000

Appl. No.:

09/661660

Inventors:

David M. Peltz - Melbourne FL
Jerome J. Tiemann - Schenectady NY
Russell S. DeMuth - Berne NY
Robert Steigerwald - Burnt Hills NY
Paul Houpt - Schenectady NY
Roy Malac - Indialantic FL
Glen Peltonen - Melbourne FL

Assignee:

GE Harris Railway Electronics LLC - Melbourne FL

International Classification:

F01K 1300

US Classification:

290 43, 60646

Abstract:

A pressurized fluid system provides electrical power to a load and includes a fluid motor, a generator, an energy storage device and a controller. The system supplies fluid to the fluid motor, which provides a generator with power producing a voltage used to supply power to a load and provide energy to the energy storage device. The controller selects which of various sources within the system provides fluid to the fluid motor based on the operating mode of the system. When fluid supplied to the fluid motor is discontinued, the energy storage device discharges providing power to the load.

US Patent:

6556462, Apr 29, 2003

Filed:

Jun 28, 2002

Appl. No.:

10/064278

Inventors:

Robert Louis Steigerwald - Burnt Hills NY
Vinod John - Montpelier VT
Milan Zarko Ilic - Fort Collins CO

Assignee:

General Electric Company - Niskayuna NY

International Classification:

H02M 7217

US Classification:

363 89

Abstract:

A high power factor converter system comprises an input rectifier, a converter and a booster circuit. The input rectifier is configured for rectifying an input ac voltage. The converter is configured for generating an output voltage for the high power factor converter system. The converter comprises several converter switches and inverse parallel diodes. The booster circuit comprises an inductor and at least one converter switch and an inverse parallel diode of the converter. The inductor is coupled between the input rectifier and the converter. The booster circuit is configured for controlling the supply of a booster current through the inductor to be discontinuous when the instantaneous voltage level is less than a predetermined fraction of a dc voltage level across the converter and continuous when the instantaneous voltage level is greater than the predetermined fraction of the dc voltage level.

US Patent:

6583705, Jun 24, 2003

Filed:

Sep 7, 2001

Appl. No.:

09/682487

Inventors:

Michael Joseph Schutten - Rotterdam NY
Robert Louis Steigerwald - Burnt Hills NY
William George Earls - Schenectady NY

Assignee:

General Electric Company - Niskayuna NY

International Classification:

H01F 2728

US Classification:

336229, 336200, 336208

Abstract:

A high current inductor is constructed using two single-sided or double-sided printed circuit boards having patterned copper traces thereon, a magnetic toroidal core, and multiple interconnecting wires extending between the boards. Multiple turns for the inductor are created by suitably configuring the copper traces on the printed circuit boards. Vias are employed on each circuit board for electrically interconnecting the boards to each other. Multiple thick, solid-gauge wires are situated in the vias in order to provide a very large copper area, thus providing high current carrying capability.

US Patent:

6693805, Feb 17, 2004

Filed:

Jul 31, 2002

Appl. No.:

10/209034

Inventors:

Robert Louis Steigerwald - Burnt Hills NY
Michael Joseph Schutten - Rotterdam NY

Assignee:

Lockheed Martin Corporation

International Classification:

H02M 114

US Classification:

363 39, 363 46, 323259, 323290

Abstract:

A low-ripple power supply includes a storage capacitor coupled across load terminals, and an inductor connected to a source of voltage including a varying or pulsatory component and a direct component, for causing a flow of current to said capacitor through the inductor. The varying component of the inductor current flowing in the capacitor results in ripple across the load. A winding is coupled to the inductor for generating a surrogate of the varying inductor current. The surrogate current is added to the inductor current to cancel or reduce the magnitude of the varying current component. This cancellation effectively reduces the varying current component flowing in the storage capacitor, which in turn reduces the ripple appearing across the load terminals. ( ).

US Patent:

6735094, May 11, 2004

Filed:

Aug 15, 2002

Appl. No.:

10/219121

Inventors:

Robert Louis Steigerwald - Burnt Hills NY
Chester Frank Saj - Amsterdam NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02M 3335

US Classification:

363 17, 363 98, 363 5603

Abstract:

A low noise, multiple output power supply circuit featuring a plurality of efficient linear regulators comprises a transformer having a primary circuit with a primary transformer input winding and a plurality of secondary circuits. Each secondary circuit has a secondary transformer output winding having the same number of turns of secondary windings. A saturable reactor core is placed in series with at least one selected output winding of at least one selected secondary circuit to subtract a small amount of average voltage, volt-seconds, from the output voltage of the selected output winding to allow different rectified DC voltages to be obtained from different output windings which have the same number of turns.

US Patent:

6930483, Aug 16, 2005

Filed:

Aug 1, 2003

Appl. No.:

10/632283

Inventors:

Juan Antonio Sabate - Gansevoort NY, US
Robert Louis Steigerwald - Burnt Hills NY, US
Michael Joseph Schutten - Rotterdam NY, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

G01V003/00

US Classification:

324322, 324318, 324309

Abstract:

A method of operating a system having a coil includes providing a switched amplified current to the coil, and adding a second current to the switched amplified current, wherein the second current is substantially out of phase with the switched amplified current such that the coil receives current with substantially no switching frequency ripple.

US Patent:

7007898, Mar 7, 2006

Filed:

Jun 20, 2002

Appl. No.:

10/064193

Inventors:

Russell Stephen Demuth - Berne NY, US
Robert Louis Steigerwald - Burnt Hills NY, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

B61L 23/34

US Classification:

246122R

Abstract:

An apparatus comprising: a data acquisition module adapted for acquiring railcar data from a railcar and generating acquired data; and an electronic transmitter adapted for receiving the acquired data, deriving transmitted data from the acquired data, and transmitting the transmitted data.